Beam characteristics of mechanically tunable magnetron injection guns

The electron beam of a gyrotron is typically generated by a magnetron injection gun (MIG). A single anode MIG capable of mechanical tuning was developed. Previous gyro-TWT assumes that the operating point of the mechanically tunable MIG is in the temperature limited region. The cathode current is th...

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Bibliographic Details
Published inThird IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524) pp. 274 - 275
Main Authors Yi Sheng Yeh, Tsun-Hsu Chang, Chao-Ta Fan
Format Conference Proceeding
LanguageEnglish
Published IEEE 2002
Subjects
Anodes
Cathodes
Current density
Current measurement
Displays
Electrodes
Electrons
Guns
Magnetic field measurement
Temperature
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Summary:The electron beam of a gyrotron is typically generated by a magnetron injection gun (MIG). A single anode MIG capable of mechanical tuning was developed. Previous gyro-TWT assumes that the operating point of the mechanically tunable MIG is in the temperature limited region. The cathode current is thus dominated by the cathode temperature. However, a slight adjustment in position of the center electrode of the mechanically tunable MIG can significant modify the electric-field profile. The beam current of the mechanically tunable MIG is thus not only dependent on the cathode temperature, but also the relative position of center electrode.
ISBN:9780780372566
0780372565
DOI:10.1109/IVELEC.2002.999376